update declarative schema changer docs with info about multi region

[dikshant]

Dikshant Adhikari (dikshant) commented:

In this doc:
https://www.cockroachlabs.com/docs/stable/online-schema-changes.html#declarative-schema-changer

We should add that ADD/DROP COLUMN also run under declarative schema changer as of 23.1 by default. Unless the table has zone configs applied to them or is a multi region table (eg regional by row).

cc: @fqazi

Jira Issue: DOC-8249

[fqazi]

It's been supported since 22.2

[exalate-issue-sync]

Richard Loveland (rmloveland) commented:
Dikshant Adhikari do we still care about this?